Micellar electrokinetic chromatography of aromatic anions and non-ionic aromatic compounds with stepwise changes of the concentration of cetyltrimethylammonium chloride

► Stepwise-elution MEKC changing concentration of micelle during single separation. ► A gradient method changing phase ratio of distribution phases of chromatography. ► Shortening analysis time and improving separation for ionic and non-ionic analytes. ► Stable operation by a supporting electrolyte maintaining a fixed electric field.